Grate.



INI/Enron ATTORNEYS Patend July 2, 1918;

1.8,.WASHBURN.

GRATE.

APPLICATION FILED DEC.22. 1917.

Milf/fr WITNESSES l, so

UNITED, STATES PATENT OFFICE.

JOHN S. WASHBURN, OF SUFFERN, NEW YORK.

Gears.

Specification of Letters Patent.

Patented July 2,1918.

appiication fixed December 22, 1917. serial No. 208,452;

To ad whom it may concern.'

Be it known that I. JOHN S. WASHBURM a citizen of the'United States, anda resi-l'.

dent` of Suffern, inthe county of Rockland and State of New York', haveAinvented a new and Improved Grate zof which the following is a full,`clear, and exact description.

The object of the invention is'to provide a new and improved gratearranged to insure proper burning'of the fuel especially coal and topermit of readily disposing of clinkers, lumps and other 'similar'matter liable to lod e in the grateand obstructing' shaking of tiegrate.

In order to accomplish the desired result use is made of fixed gratebars, a movabie gra-te bar intermedi-ate the said fixed-grate bars,l thesaid grate bars being 4provided at their opposite faces `withpro]ecting.grind- Figure 1 is a sectional plan view of the f grate inposition in a heater, the section beingpn the line 1-1 of Fig. 2;

iig. 2 is a sectional side elevation of the same on the line 2-2 of Fig.1; and

Fig. 3 is a .transverse section of the same on the line 3-3 of Fig. 2. r

The grate in its eneral construction is provided with two xed grate bars10 and -11 provided with supporting flanges 12 adapted to rest onflanges 13 med on the inside of the heater casing 14 to properly supportthe said grate bars 10 and 11 within the heater casing at the lower orash pit portion thereof.- The fixed grate bars 10 and 11 are providedwith downwardly and inwardly inclined members 15 and 16 which terminatein depending vertical members 17 and 18 spaced a art to provide room fora movable grate ar 19 intermediate the said members 17 and 18 of thefixed grate bars 10 and 11. The movable grate bar 19 is in the form of apeak in cross section and is provided at the lower ends of its sideswith rods 20 and 21 mounted to slide in bearings 22 formed on the frontand rear end's of the casing 14e, as plainlyr indicated in Fig. 2.

The under side of the movable grate bar 19 is pivotally connected by alink or apitman 25 with a crank 26 of a -crank shaft 27 Journaled insuitable bearings 28 arranged on the sides of the heater casing 14. Queouter end of the crank shaft 27 is provided with a handle 29tofpermit-.an operatortoturn the crankshaft 27 with a view to impart aforward andv'rearward sliding movement to the movable grate bar 19.

In orderV to agitate the burning fuel and to dislodge or grind up anycinders that may lod e between themovable grate bar' 19 and t 1e members17 and 18 of the fixed grate bars 10 and 11, the following arrangementis made: The movable grate bar 19 is provi-ded with grinding members30'in the form of 4ribs or similar projections 'extendmg along the sidesand over the apex,v andv grinding members 31 and32 are formed on theinner faces of the depending members 17 and 18 of the fixed grate bars10 and 1l and which grindin coact with the grin in members 30 when'lever the movable mem er v19 is caused to reciprocate `by the operatormanipulating the lhandle 29.

The inclined members 15' and 16 of -fixedgrate bars 10 and 11 areprovided with slots or openings 40 and 41 for the upward passage of airand the downward passage of ashes into the ash it. The grinding members31 and 32 of t e depending members 17 and 18 are provided with o enings42 and 43 for the passage of air an ashes, and the assages are formedbetween the lower en s of the depending members 17 and 18 and the lowerends of the sides of the movable grate bar 19 to permit ashes to dropdown into the ash pit and to allow air to pass upward to insure propercom` bustion of the fuel on the grate bars 10, 11 and 19. It will benoticed that by the arrangement described, the burning fuel can bereadil distributed and agitated on im parting engthwise movement to themovable grate bar 19, and any cinders and the like lodged between themovable grate bar 19 and the depending members 17 and 18 is readilyground up or dislodged to drop down into the ash pit.

The upper ends of the grate bars 10 and members 31 and 324 furnace` forren'iovingthe ashes` from the ash pit whenever it is desired to do so.

From the foregoing it will be seen that the grate is very simple inconstruction and can be readily kept free of ashes, cinders and the liketo insure proper combustion of the fuel.

Having thus described my invention, I claim as new and desire to secureby Letters Patent-: v

1. A grate, comprising xed and spaced grate bars, a movable gratel barbetween the said fixed grate bars, the said grate bars being provided ontheir opposing faces with projecting grinding members, and manuallycontrolled means inparting reciprocating movement to the movable gratebar lengthwise thereof.

2. A grate, comprising fixed grate bars spaced apart and havingperforare portions inclined toward each other and terminating at theirlower ends in approximately vertical portions, a movable grate barintermediate the said vertical portions of the 'fixed grate bar andapproximately peak shape in cross section, and means for iin-parting areciprocating motion to the movable grate bar lengthwise thereof.

3. A fgrate, comprising 'fixed grate bars spaced apart and havinperforate portions inclined toward each ot er and terminating at theirlower ends in approximately verti- -cal portions a movable grate barintermediate `the sai 4vertical portions of the fixed grate bar andapproximately peak-shape in cross section, fixed rods on which the saidmovable grate bar is mounted to slide, and means for imparting areciprocating motion Ato the movable grate bar lengthwise thereof.

4. A grate, comprising fixed grate bars spaced apart and havingperforate portions inclined toward each other and terminating at theirlower ends in approximately vertical portions, a movable grate barintermediate the said vertical portions of the Fixed grate bar andapproximately peak shape in cross section, fixed rods on which the saidmovable grate bar is mounted to slide lengthwise, a crank shaft underthe control of an operator, and a link connecting the said movable gratebar with the crank of the said crank shaft.

5. A grate, comprising fixed grate bars spaced apart and havingperforate portions inclined toward each other and terminating at theirlower ends in approximately vertical portions, a movable grate barintermediate the said vertical portions of the fixed grate bar andapproximately pea-k shape in cross section, the faces of the saidmovable grate bar being pro-vided with integral grinding members, andthe faces of the said vertical portions of the fixed grate members being-provided with integral grinding members, and means for imparting areciprocating motion to the movable grate bar lengthwise thereof.

J OHN S. VVASHBURN.

Bepi of this 'patent my be obtained lor-ive cents each, `by addressingthe "commissioner of Patents.

Wnhinrton, DAI.

